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5e/9+12=2
We move all terms to the left:
5e/9+12-(2)=0
We add all the numbers together, and all the variables
5e/9+10=0
We multiply all the terms by the denominator
5e+10*9=0
We add all the numbers together, and all the variables
5e+90=0
We move all terms containing e to the left, all other terms to the right
5e=-90
e=-90/5
e=-18
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